CS4270-DZZR datasheet(11/48 Pages) CIRRUS

Part #	CS4270-DZZR

Description	24-Bit, 192 kHz Stereo Audio CODEC

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Manufacturer	CIRRUS [Cirrus Logic]

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DS686A1

11

CS4270

DAC COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE

(The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired sam-

ple rate by multiplying the given characteristic by Fs.) (See Note 5)

5.

Amplitude vs. Frequency plots of this data are available in Section 11. “Appendix” on page 42. See

Figures 19 through 42.

6.

Response is clock dependent and will scale with Fs.

7.

For Single-Speed Mode, the Measurement Bandwidth is 0.5465 Fs to 3 Fs.

For Double-Speed Mode, the Measurement Bandwidth is 0.577 Fs to 1.4 Fs.

For Quad-Speed Mode, the Measurement Bandwidth is 0.7 Fs to 1 Fs.

8.

De-emphasis is available only in Single-Speed Mode.

Parameter

Symbol

Min

Typ

Max

Unit

Single-Speed Mode

Passband (

Note 6)

to -0.05 dB corner

to -3 dB corner

0

-

.4780

.4996

Fs

Frequency Response 10 Hz to 20 kHz

-.01

-

+.08

dB

StopBand

.5465

-

Fs

StopBand Attenuation

(Note 7)

50

-

dB

Group Delay

tgd

-

10/Fs

-

s

De-emphasis Error (Note 8)

Fs = 32 kHz

Fs = 44.1 kHz

Fs = 48 kHz

-

+1.5/+0

+.05/-.25

-.2/-.4

dB

Double-Speed Mode

Passband (

Note 6)

to -0.1 dB corner

to -3 dB corner

0

-

.4650

.4982

Fs

Frequency Response 10 Hz to 20 kHz

-.05

-

+.2

dB

StopBand

.5770

-

Fs

StopBand Attenuation

(Note 7)

55

-

dB

Group Delay

tgd

-

5/Fs

-

s

Quad-Speed Mode

Passband (

Note 6)

to -0.1 dB corner

to -3 dB corner

0

-

0.397

0.476

Fs

Frequency Response 10 Hz to 20 kHz

0

-

+0.00004

dB

StopBand

0.7

-

Fs

StopBand Attenuation

(Note 7)

51

-

dB

Group Delay

tgd

-

2.5/Fs

-

s

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